Hi,
Ubuntu doesn't support downgrades, well it supports some kind of downgrade for older version but is not reliable and highly not recommended. The only sure way to revert is a clean install of the older version. You can think of some kind form of backup, like disk image backup, for easy reinstall in case you want to return to the previous installed version , but Ubuntu doesn't support any downgrades by default.
Last edited by goodhombre; 02-07-2018 at 11:31 AM.
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